How to Properly Maintain and Clean an Espresso Coffee Machine Espresso machines push water through the coffee grounds using pressure. This type of brewing makes more flavor than drip coffee. The machines require 9 bars of pressure to extract flavor from the coffee grounds. There are three kinds of espresso https://www.coffeee.uk/products/de-longhi-vintage-icona-espresso-cappuccino-machine-cream-1-4l